UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAK SCI004000 Astronomy
BISAK SCI005000 Physics / Astrophysics
The interaction of the cosmological gamma-ray background photons with soft cosmological background with producing electron-positron pairs is considered. It is shown that the majority of positrons are produced with energies of 10 Gev - 1 TeV. However, the interaction of ``X-ray" cosmological background photons may produce the positrons with energies of 10-100 keV.
cosmology: cosmic background radiation; positrons
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